Reflection type screen

Abstract

A reflection type screen including: a base portion which is tabular; and a plurality of prism portions which are provided on one surface of the base portion, extending in one direction and lined up in a direction intersecting the one direction, wherein the plurality of prism portions each have: a pair of surfaces, at least one of the pair of surfaces being inclined with respect to the normal direction of the one surface of the base portion and intersecting the other of the pair of surfaces; and a reflecting layer, being formed on the one of the pair of surfaces and reflecting light, and wherein the reflecting layer includes a low friction portion dispersed over within a reflecting portion to reflect light, having lower friction coefficient than that of the reflecting portion.

What is claimed is: 
     
       1. A reflection type screen comprising:
 a base portion which is tabular; and 
 a plurality of prism portions which are provided on one surface of the base portion, extending in one direction and lined up in a direction intersecting the one direction, wherein 
 the plurality of prism portions each have: 
 a pair of surfaces, at least one of the pair of surfaces being inclined with respect to a normal direction of the one surface of the base portion and intersecting the other of the pair of surfaces; and 
 a reflecting layer, being formed on the one of the pair of surfaces and reflecting light, and 
 the reflecting layer includes a reflecting portion to reflect light, and a low friction portion dispersed over the reflecting portion and having a lower friction coefficient than that of the reflecting portion. 
 
     
     
       2. The reflection type screen according to  claim 1 , wherein the reflecting layer includes, on the one of the pair of surfaces, a first thin portion, a thick portion and a second thin portion in this order from a side of an intersection line of the one of the pair of surfaces and the other of the pair of surfaces. 
     
     
       3. The reflection type screen according to  claim 2 , wherein the first thin portion extends up to the other of the pair of surfaces crossing the intersection line. 
     
     
       4. The reflection type screen according to  claim 3 , wherein the low friction portion has higher transmittance than that of the reflecting portion. 
     
     
       5. The reflection type screen according to  claim 2 , wherein the low friction portion has higher transmittance than that of the reflecting portion. 
     
     
       6. The reflection type screen according to  claim 1 , wherein
 the plurality of prism portions each further have a light-absorbing layer, being formed on the other of the pair of surfaces to absorb light, and 
 the light-absorbing layer includes a light-absorbing portion to absorb light and the low friction portion, dispersed over the light-absorbing portion and having a lower friction coefficient than that of the light-absorbing portion, and 
 the light-absorbing layer extends up to the one of the pair of surfaces crossing an intersection line of the one of the pair of surfaces and the other of the pair of surfaces, and does not cover the reflecting layer or covers only a part of the reflecting layer. 
 
     
     
       7. The reflection type screen according to  claim 6 , wherein
 the light-absorbing layer further includes a second light-absorbing portion to absorb light, and 
 the second light-absorbing portion has higher light absorptance than that of the light-absorbing layer. 
 
     
     
       8. The reflection type screen according to  claim 7 , wherein
 the reflecting layer further includes a second reflecting portion to reflect light, and 
 the second reflecting portion has higher reflectivity than that of the reflecting layer. 
 
     
     
       9. The reflection type screen according to  claim 6 , wherein
 the reflecting layer further includes a second reflecting portion to reflect light, and 
 the second reflecting portion has higher reflectivity than that of the reflecting layer. 
 
     
     
       10. The reflection type screen according to  claim 1 , wherein
 the plurality of prism portions each further have:
 a light-absorbing layer, being formed on the other of the pair of surfaces to absorb light; and 
 a low friction layer, being formed on the light-absorbing layer and having a lower friction coefficient than that of the light-absorbing layer, and 
 
 the light-absorbing layer extends up to the one of the pair of surfaces crossing an intersection line of the one of the pair of surfaces and the other of the pair of surfaces, and does not cover the reflecting layer or covers only a part of the reflecting layer. 
 
     
     
       11. The reflection type screen according to  claim 10 , wherein
 the reflecting layer further includes a second reflecting portion to reflect light, and 
 the second reflecting portion has higher reflectivity than that of the reflecting layer. 
 
     
     
       12. The reflection type screen according to  claim 1 , wherein
 the plurality of prism portions each further have a light-absorbing layer to absorb light, which is formed on the other of the pair of surfaces side on the one of the pair of surfaces without covering the reflecting layer or is formed so as to cover an end portion of the other of the pair of surfaces side in the direction intersecting the one direction of the reflecting layer, 
 the light-absorbing layer is shorter than the reflecting layer in the direction intersecting the one direction, and 
 the light-absorbing layer includes a light-absorbing portion to absorb light and the low friction portion dispersed over the light-absorbing portion and having a lower friction coefficient than that of the light-absorbing portion. 
 
     
     
       13. The reflection type screen according to  claim 12 , wherein
 the light-absorbing layer further includes a second light-absorbing portion to absorb light, and 
 the second light-absorbing portion has higher light absorptance than that of the light-absorbing layer. 
 
     
     
       14. The reflection type screen according to  claim 13 , wherein
 the reflecting layer further includes a second reflecting portion to reflect light, and 
 the second reflecting portion has higher reflectivity than that of the reflecting layer. 
 
     
     
       15. The reflection type screen according to  claim 12 , wherein
 the reflecting layer further includes a second reflecting portion to reflect light, and 
 the second reflecting portion has higher reflectivity than that of the reflecting layer. 
 
     
     
       16. The reflection type screen according to  claim 1 , wherein
 the plurality of prism portions each further have:
 a light-absorbing layer to absorb light, which is formed on the other of the pair of surfaces side on the one of the pair of surfaces without covering the reflecting layer or is formed so as to cover an end portion of the other of the pair of surfaces side in the direction intersecting the one direction of the reflecting layer; and 
 a low friction layer, being formed on the light-absorbing layer and having a lower friction coefficient than that of the light-absorbing layer, and 
 
 the light-absorbing layer is shorter than the reflecting layer in the direction intersecting the one direction. 
 
     
     
       17. The reflection type screen according to  claim 16 , wherein
 the reflecting layer further includes a second reflecting portion to reflect light, and 
 the second reflecting portion has higher reflectivity than that of the reflecting layer. 
 
     
     
       18. A reflection type screen comprising:
 a base portion which is tabular; and 
 a plurality of prism portions which are provided on one surface of the base portion, extending in one direction and lined up in a direction intersecting the one direction, wherein 
 the plurality of prism portions each have:
 a pair of surfaces, at least one of the pair of surfaces being inclined with respect to a normal direction of the one surface of the base portion and intersecting the other of the pair of surfaces; 
 a reflecting layer, being formed on the one of the pair of surfaces and reflecting light; and 
 a low friction layer, being formed on the reflecting layer and having a lower friction coefficient than that of the reflecting layer. 
 
 
     
     
       19. The reflection type screen according to  claim 18 , wherein
 the reflecting layer includes a reflecting portion to reflect light and a transmitting portion having higher transmittance than that of the reflecting portion, dispersed over the reflecting portion. 
 
     
     
       20. The reflection type screen according to  claim 18 , wherein
 the plurality of prism portions each further have a light-absorbing layer, being formed on the other of the pair of surfaces to absorb light, 
 the light-absorbing layer includes a light-absorbing portion to absorb light and a low friction portion dispersed over the light-absorbing portion and having a lower friction coefficient than that of the light-absorbing portion, and 
 the light-absorbing layer extends up to the one of the pair of surfaces crossing an intersection line of the one of the pair of surfaces and the other of the pair of surfaces, and does not cover any of the reflecting layer or the low friction layer, or covers only a part of at least one of the reflecting layer and the low friction layer. 
 
     
     
       21. The reflection type screen according to  claim 20 , wherein
 the light-absorbing layer further includes a second light-absorbing portion to absorb light, and 
 the second light-absorbing portion has higher light absorptance than that of the light-absorbing layer. 
 
     
     
       22. The reflection type screen according to  claim 18 , wherein
 the plurality of prism portions each further have:
 a light-absorbing layer, being formed on the other of the pair of surfaces to absorb light; and 
 a low friction layer, being formed on the light-absorbing layer and having a lower friction coefficient than that of the light-absorbing layer, and 
 
 the light-absorbing layer extends up to the one of the pair of surfaces crossing an intersection line of the one of the pair of surfaces and the other of the pair of surfaces, and does not cover any of the reflecting layer or the low friction layer, or covers only a part of at least one of the reflecting layer and the low friction layer. 
 
     
     
       23. The reflection type screen according to  claim 18 , wherein
 the plurality of prism portions each further have
 a light-absorbing layer to absorb light, which is formed on the other of the pair of surfaces side on the one of the pair of surfaces so as not to cover any of the reflecting layer or the low friction layer, or is formed so as to cover an end portion on the other of the pair of surfaces side in the direction intersecting the one direction of at least one of the reflecting layer and the low friction layer, 
 
 the light-absorbing layer is shorter than the reflecting layer in the direction intersecting the one direction, and 
 the light-absorbing layer includes a light-absorbing portion to absorb light and a low friction portion dispersed over the light-absorbing portion and having a lower friction coefficient than that of the light-absorbing portion. 
 
     
     
       24. The reflection type screen according to  claim 23 , wherein
 the light-absorbing layer further includes a second light-absorbing portion to absorb light, and 
 the second light-absorbing portion has higher light absorptance than that of the light-absorbing layer. 
 
     
     
       25. The reflection type screen according to  claim 18 , wherein
 the plurality of prism portions each further have:
 a light-absorbing layer to absorb light, which is formed on the other of the pair of surfaces side on the one of the pair of surfaces so as not to cover any of the reflecting layer or the low friction layer, or is formed so as to cover an end portion on the other of the pair of surfaces side in the direction intersecting the one direction of at least one of the reflecting layer and the low friction layer; and 
 a low friction layer, being formed on the light-absorbing layer and having a lower friction coefficient than that of the light-absorbing layer, and 
 
 the light-absorbing layer is shorter than the reflecting layer in the direction intersecting the one direction.